Q1. I have the GA150 external GPS Antenna - I have been trying to figure out how to have the MFD make the GA150 the primary antenna?
A1. Understand that the GA150 is a passive GPS antenna, having about as much processing capability as the AM/FM antenna on your automobile. The function of the GA150 is to relay / amplify received GPS signal which in turn will be passed to the MFD's internal GPS receiver. Unless the system includes other MFDs w/internal GPS receivers or includes a GPS sensor (ex. Raystar 150/130 GPS Sensor, Airmar Weather Station, etc.), then the system will automatically use the MFD's internal GPS receiver (with the aid of the GA150) as its GPS data source. Should the system feature more than one source of GPS data, then the MFD's Data Sources feature would be used to specify which GPS data source will be used by the system.